How to change icons color on android

Hello, I was just wondering how to change the color of the status bar icons (they always appear white, I wish I could turn them black) on android. I know that you have to make an xml styles file in which to define the new style and then assign that style in Android Manifest, but I don’t know how to do it because you can no longer enter files inside the res folder (it’s obsolete) and there is no information on the internet about how to do it.